*
*/
-#include "internal.h"
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h> /* for _IO */
#include <sys/utsname.h>
-#include <sys/stat.h>
#include <asm/page.h> /* for PAGE_SIZE and PAGE_SHIFT */
/* we also get PAGE_SIZE via getpagesize() */
-
-
-static const char mkswap_usage[] =
- "mkswap [-c] [-v0|-v1] device [block-count]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nPrepare a disk partition to be used as a swap partition.\n\n"
- "Options:\n" "\t-c\t\tCheck for read-ability.\n"
- "\t-v0\t\tMake version 0 swap [max 128 Megs].\n"
- "\t-v1\t\tMake version 1 swap [big!] (default for kernels > 2.1.117).\n"
-
- "\tblock-count\tNumber of block to use (default is entire partition).\n"
-#endif
- ;
-
+#include "busybox.h"
#ifndef _IO
/* pre-1.3.45 */
-#define BLKGETSIZE 0x1260
+static const int BLKGETSIZE = 0x1260;
#else
/* same on i386, m68k, arm; different on alpha, mips, sparc, ppc */
#define BLKGETSIZE _IO(0x12,96)
#define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r))
-static int linux_version_code(void)
-{
- struct utsname my_utsname;
- int p, q, r;
-
- if (uname(&my_utsname) == 0) {
- p = atoi(strtok(my_utsname.release, "."));
- q = atoi(strtok(NULL, "."));
- r = atoi(strtok(NULL, "."));
- return MAKE_VERSION(p, q, r);
- }
- return 0;
-}
-
/*
* The definition of the union swap_header uses the constant PAGE_SIZE.
* Unfortunately, on some architectures this depends on the hardware model,
static int pagesize;
static int *signature_page;
-struct swap_header_v1 {
+static struct swap_header_v1 {
char bootbits[1024]; /* Space for disklabel etc. */
unsigned int version;
unsigned int last_page;
#ifdef PAGE_SIZE
if (pagesize != PAGE_SIZE)
- fprintf(stderr, "Assuming pages of size %d\n", pagesize);
+ error_msg("Assuming pages of size %d", pagesize);
#endif
signature_page = (int *) xmalloc(pagesize);
memset(signature_page, 0, pagesize);
}
-void die(const char *str)
-{
- fprintf(stderr, "%s: %s\n", applet_name, str);
- exit(FALSE);
-}
-
-void page_ok(int page)
+static void page_ok(int page)
{
if (version == 0)
bit_set(signature_page, page);
}
-void page_bad(int page)
+static void page_bad(int page)
{
if (version == 0)
bit_test_and_clear(signature_page, page);
else {
if (badpages == MAX_BADPAGES)
- die("too many bad pages");
+ error_msg_and_die("too many bad pages");
p->badpages[badpages] = page;
}
badpages++;
}
-void check_blocks(void)
+static void check_blocks(void)
{
unsigned int current_page;
int do_seek = 1;
}
if (do_seek && lseek(DEV, current_page * pagesize, SEEK_SET) !=
current_page * pagesize)
- die("seek failed in check_blocks");
+ error_msg_and_die("seek failed in check_blocks");
if ((do_seek = (pagesize != read(DEV, buffer, pagesize)))) {
page_bad(current_page++);
continue;
int fd;
long size;
- fd = open(file, O_RDONLY);
- if (fd < 0) {
- perror(file);
- exit(1);
- }
+ if ((fd = open(file, O_RDONLY)) < 0)
+ perror_msg_and_die("%s", file);
if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
int sectors_per_page = pagesize / 512;
PAGES = strtol(argv[0], &tmp, 0) / blocks_per_page;
if (*tmp)
- usage(mkswap_usage);
+ show_usage();
} else
device_name = argv[0];
} else {
version = atoi(argv[0] + 2);
break;
default:
- usage(mkswap_usage);
+ show_usage();
}
}
}
if (!device_name) {
- fprintf(stderr,
- "%s: error: Nowhere to set up swap on?\n", applet_name);
- usage(mkswap_usage);
+ error_msg("error: Nowhere to set up swap on?");
+ show_usage();
}
sz = get_size(device_name);
if (!PAGES) {
PAGES = sz;
} else if (PAGES > sz && !force) {
- fprintf(stderr,
- "%s: error: "
- "size %ld is larger than device size %d\n",
- applet_name,
+ error_msg("error: size %ld is larger than device size %d",
PAGES * (pagesize / 1024), sz * (pagesize / 1024));
- exit(FALSE);
+ return EXIT_FAILURE;
}
if (version == -1) {
if (PAGES <= V0_MAX_PAGES)
version = 0;
- else if (linux_version_code() < MAKE_VERSION(2, 1, 117))
+ else if (get_kernel_revision() < MAKE_VERSION(2, 1, 117))
version = 0;
else if (pagesize < 2048)
version = 0;
version = 1;
}
if (version != 0 && version != 1) {
- fprintf(stderr, "%s: error: unknown version %d\n",
- applet_name, version);
- usage(mkswap_usage);
+ error_msg("error: unknown version %d", version);
+ show_usage();
}
if (PAGES < 10) {
- fprintf(stderr,
- "%s: error: swap area needs to be at least %ldkB\n",
- applet_name, (long) (10 * pagesize / 1024));
- usage(mkswap_usage);
+ error_msg("error: swap area needs to be at least %ldkB",
+ (long) (10 * pagesize / 1024));
+ show_usage();
}
#if 0
maxpages = ((version == 0) ? V0_MAX_PAGES : V1_MAX_PAGES);
#else
if (!version)
maxpages = V0_MAX_PAGES;
- else if (linux_version_code() >= MAKE_VERSION(2, 2, 1))
+ else if (get_kernel_revision() >= MAKE_VERSION(2, 2, 1))
maxpages = V1_MAX_PAGES;
else {
maxpages = V1_OLD_MAX_PAGES;
#endif
if (PAGES > maxpages) {
PAGES = maxpages;
- fprintf(stderr, "%s: warning: truncating swap area to %ldkB\n",
- applet_name, PAGES * pagesize / 1024);
+ error_msg("warning: truncating swap area to %ldkB",
+ PAGES * pagesize / 1024);
}
DEV = open(device_name, O_RDWR);
- if (DEV < 0 || fstat(DEV, &statbuf) < 0) {
- perror(device_name);
- exit(FALSE);
- }
+ if (DEV < 0 || fstat(DEV, &statbuf) < 0)
+ perror_msg_and_die("%s", device_name);
if (!S_ISBLK(statbuf.st_mode))
check = 0;
else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
- die("Will not try to make swapdevice on '%s'");
+ error_msg_and_die("Will not try to make swapdevice on '%s'", device_name);
#ifdef __sparc__
if (!force && version == 0) {
unsigned short *q, sum;
if (read(DEV, buffer, 512) != 512)
- die("fatal: first page unreadable");
+ error_msg_and_die("fatal: first page unreadable");
if (buffer[508] == 0xDA && buffer[509] == 0xBE) {
q = (unsigned short *) (buffer + 510);
for (sum = 0; q >= (unsigned short *) buffer;)
sum ^= *q--;
if (!sum) {
- fprintf(stderr, "\
-%s: Device '%s' contains a valid Sun disklabel.\n\
-This probably means creating v0 swap would destroy your partition table\n\
-No swap created. If you really want to create swap v0 on that device, use\n\
-the -f option to force it.\n", applet_name, device_name);
- exit(FALSE);
+ error_msg("Device '%s' contains a valid Sun disklabel.\n"
+"This probably means creating v0 swap would destroy your partition table\n"
+"No swap created. If you really want to create swap v0 on that device, use\n"
+"the -f option to force it.", device_name);
+ return EXIT_FAILURE;
}
}
}
if (version == 0 || check)
check_blocks();
if (version == 0 && !bit_test_and_clear(signature_page, 0))
- die("fatal: first page unreadable");
+ error_msg_and_die("fatal: first page unreadable");
if (version == 1) {
p->version = version;
p->last_page = PAGES - 1;
goodpages = PAGES - badpages - 1;
if (goodpages <= 0)
- die("Unable to set up swap-space: unreadable");
+ error_msg_and_die("Unable to set up swap-space: unreadable");
printf("Setting up swapspace version %d, size = %ld bytes\n",
version, (long) (goodpages * pagesize));
write_signature((version == 0) ? "SWAP-SPACE" : "SWAPSPACE2");
offset = ((version == 0) ? 0 : 1024);
if (lseek(DEV, offset, SEEK_SET) != offset)
- die("unable to rewind swap-device");
+ error_msg_and_die("unable to rewind swap-device");
if (write(DEV, (char *) signature_page + offset, pagesize - offset)
!= pagesize - offset)
- die("unable to write signature page");
+ error_msg_and_die("unable to write signature page");
/*
* A subsequent swapon() will fail if the signature
* is not actually on disk. (This is a kernel bug.)
*/
if (fsync(DEV))
- die("fsync failed");
- return(TRUE);
+ error_msg_and_die("fsync failed");
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff